build breaks - icu49 ?

While doing a icu49.1 rebuild I'm running into this build break with
3.5.1:

genbrk: tool completed successfully.
/usr/bin/genbrk -r count_word_fi.txt.p -o count_word_fi.brk
LD_LIBRARY_PATH="/build/src/libreoffice-core-3.5.1.2/solver/unxlngx6.pro/lib" 
/build/src/libreoffice-core-3.5.1.2/solver/unxlngx6.pro/bin/gencoll_rule 
/build/src/libreoffice-core-3.5.1.2/i18npool/source/collator/data/zh_stroke.txt 
collator_zh_stroke_invis.cxx zh_stroke
genbrk: tool completed successfully.
sed 's/\(^.*get_\)/SAL_DLLPUBLIC_EXPORT \1/' indexdata_ko_dict_invis.cxx > indexdata_ko_dict.cxx
/usr/bin/genbrk -r dict_word_he.txt.p -o dict_word_he.brk
/usr/bin/genbrk -r char.txt.p -o char.brk
sed 's/\(^.*get_\)/SAL_DLLPUBLIC_EXPORT \1/' zh_zhuyin_invis.cxx > zh_zhuyin.cxx
createRuleBasedBreakIterator: ICU Error "U_BRK_RULE_EMPTY_SET"  at line 19, column 16
make[3]: *** [char.brk] Error 11
make[3]: *** Waiting for unfinished jobs....

Do we have a fix for this?

-Andy
ArchLinux